Add TemporaryFile class
Added support for creating temporary file
- Constructor creates the temporary file.
- Destructor deletes the file.
- Provided remove function to delete the file.
Signed-off-by: Jayanth Othayoth <ojayanth@in.ibm.com>
Change-Id: I2a5e81af8cf4f4621e5ec6437b936126b7e9ba5a
diff --git a/temporary_file.hpp b/temporary_file.hpp
new file mode 100644
index 0000000..b073b32
--- /dev/null
+++ b/temporary_file.hpp
@@ -0,0 +1,87 @@
+#pragma once
+
+#include <filesystem>
+#include <utility>
+
+namespace openpower::util
+{
+
+namespace fs = std::filesystem;
+
+/**
+ * @class TemporaryFile
+ *
+ * A temporary file in the file system.
+ *
+ * The temporary file is created by the constructor. The absolute path to the
+ * file can be obtained using getPath().
+ *
+ * The temporary file can be deleted by calling remove(). Otherwise the file
+ * will be deleted by the destructor.
+ *
+ */
+class TemporaryFile
+{
+ public:
+ // Specify which compiler-generated methods we want
+ TemporaryFile(const TemporaryFile&) = delete;
+ TemporaryFile(TemporaryFile&&) = delete;
+ TemporaryFile& operator=(const TemporaryFile&) = delete;
+
+ /**
+ * Constructor.
+ *
+ * Creates a temporary file in the temporary directory (normally /tmp).
+ *
+ * Throws an exception if the file cannot be created.
+ */
+ TemporaryFile();
+
+ /**
+ * Destructor.
+ *
+ * Deletes the temporary file if necessary.
+ */
+ ~TemporaryFile()
+ {
+ try
+ {
+ remove();
+ }
+ catch (...)
+ {
+ // Destructors should not throw exceptions
+ }
+ }
+
+ /**
+ * Deletes the temporary file.
+ *
+ * Does nothing if the file has already been deleted.
+ *
+ * Log error message if an error occurs during the deletion.
+ */
+ void remove();
+
+ /**
+ * Returns the absolute path to the temporary file.
+ *
+ * Returns an empty path if the file has been deleted.
+ *
+ * @return temporary file path
+ */
+ const fs::path& getPath() const
+ {
+ return path;
+ }
+
+ private:
+ /**
+ * Absolute path to the temporary file.
+ *
+ * Empty when file has been deleted.
+ */
+ fs::path path{};
+};
+
+} // namespace openpower::util